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176Vol.17,No.6 200111POLYMERMATERIALSSCIENCEANDENGINEERINGNov.2001杨 波,赵榆林,刘 烨(,650224):研究淀粉与丙烯酰胺在60CoV射线引发下的接枝共聚反应规律和反应机理,由实验结果得出了辐照时间与接枝聚合率的关系,辐照剂量率、单体浓度、淀粉浓度和辐照温度对接枝共聚反应速率的影响,并由此关联出接枝反应速率表达式:Rp=k[I]1/2[AM][AGU]1/2。对接枝共聚反应机理进行了初步探讨,推导的接枝共聚反应速率理论式与实验式—致。:;;;:TQ316.343 :A :1000-7555(2001)06-0064-03 ,,、、、,[1]。,,。2060,Reyes[2,3]。Varma[4]60CoV-。,,[5]。-,,。1 1.1 :,;:,;。:7.4×1015Bq60Co,,G3+Fe=15.6。1.2 1.2.1 辐照接枝共聚:,,,,,,,。,,,,,,。1.2.2 除去未参加反应的淀粉和单体:,,,,。1.2.3 分离均聚物:Varma[4],1.0000g,。60∶40()-3h,,。1.3 1.3.1 丙烯酰胺接枝聚合率的测定:,:2000-09-05 :(169942015) : ,,31,,.DOI:10.16865/j.cnki.1000-7555.2001.06.015(A):A(%)=-×100%1.3.2 接枝共聚反应速率的测定:(Rp(mol/minL))[6]。Rp=××2 2.1 Fig.1。S,,。3:①,,;②,,;②,,。Fig.1 RelationshipbetweentandAFig.2 Effectof[I]onRp2.2 (0.3~3)Gy/min,RpFig.2,。2.4Gy/min.Rp[I]1/2;2.4Gy/min,,,;,,,。2.3 Fig.3,。,,。[9],,。,。Fig.3 RelationshipofRpbetween[AM]Fig.4 RelationshipbetweenRpand[AGU]2.4 ,Fig.4。,(),。(),。,、。,(),:Rp=k[I]1/2[AM][AGU]1/22.5 :200mim,1.2Gy/min,[AM]=1.0mol/L,[AGU]65 6 :=0.05mol/L。Tab.1。Tab.1 TheinfluenceofTonRpandAT(℃)Rp×103(mol/Lmin)A(%)04.4488.754.8795.5104.7595.0204.8396.5304.8096.0404.8296.5 Tab.1,5~40℃,0℃,。()[7]:lgRp=lgk-(E/2.303R)(1/T),(E),。[7]:E=(1/2)Ei+Ep-(1/2)EtEi;Ep;Et。Ei,[7]。,E=Ep-0.5Et,Ep0.5Et,E。,Et,E,。2.6 ,,Odian[8],:(a) Cell-HhνCell·(b) Cell·+MhνCell-M·c) Cell-M·+MkpCell-M2·MMMn·(d) Cell-Mn·+Cell-Mm·ktCell-Mn-Mm-Cell,Odian[8]:Ri=GIP/100NG100eV;I;P;N。,,,:Rp=-(d[M]/dt)p=kp[M][Cell-Mi·]=kp[M][Cell-M·],:Rt=-d[M·]/dt=kt[Cell-M·]:d[p·]/dt=Ri-Rt=0[M·]=(Rikt)1/2=(GIP100Nkt)1/2:Rp=(k2pkt)1/2(G100N)1/2[I]1/2[M][P]1/2,1,0.5。。[1] (DINGYing-jun).(PolymerBul-letin),1993,13(9):140~145.[2] ReyesZ,etal.J.Polym.Sci.,1969,4:1031.[3] ReyesZ,etal.Nucl.Apple.,1969,6:509.[4] VarmaIK,etal.Angew.Makromol.Chemic.,1983,119:183~192.[5] (DENGHai),.(JournalofRadiationResearchandRadiativeProcessing),1998,16(5):65~69.[6] (GAOJian-ping),.(PolymerMaterialsScience&Engineering),2000,16(1):63~66.[7] (HUANGGuang-lin).(RadiationChemistryofPolymers).(SichuanUniversityPress),1993:272~274.[8] OdianG,SobelM,RossiA,etal.J.Appl.Polym.Sci.,1961,55:663.[9] BhattacharyyaSN,MaidasD.Prog.Polym.Sci.,1984,10:171~172.(70。tobecontinuedonP.70)662001 [4] KazimieraSG.Eur.Polym.J.,1989,25(12):1291~1295.STUDIESONTHESYNTHESISANDPROPERTIESOFSTYRENE-METHYLACRYLICACIDCOPOLYMERYANGWei,LIGuang-ji,WANGZhi,SUNLu-yi,SHENJia-rui(StateKeyLaboratoryofPolymerMaterialEngineering,Chengdu610065,China;CollegeofMaterialsScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510641,China)ABSTRACT:Styrene-methylacrylicacidcopolymers(PSMAA)weresynthesizedbyasuspensioncopolymerizationwiththedifferentmolecularweightandthecontentofmethylacrylicacid.ThemechanicalandtheprocessingpropertiesofPSM(AAcopolymerswerestudiedbytensiletester,impacttestingmachineandtorquerheometer.Theresultsshowthat:(1)boththeglasstran-sitiontemperatureandthethermalstabilityincreasewiththeincreaseofMAAcontentinPSMAAcopolymer.(2)thetensileandimpactstrengthenhancewiththeincreaseofeithertheMAAcontentorthemolecularweight.(3)TheprocessingpropertiesofPSMAAcopolymersarebetter,eithermolecularweight(M-n)isinrangeof1×105andMAAcontentis18mol%or2×105molecularweightand8mol%MAAcontent.Keywords:styrene-methylacrylicacidcopolymer;suspensionpolymerization;mechanicalproperty;processingproperty(66。continuedfromp.66)STUDYONRADIATIVEGRAFTCOPOLYMERIZATIONOFSTARCH/PAMYANGBo,ZHAOYu-lin,LIUYe(CollegeofBiologyandChemicalEngineering,KunmingUniversityofTechnology,Kunming650224,China)ABSTRACT:Themechanismofstarch/acrylamidegraftcopolymerizationofVraysfromacobalt60(60Co)sourceasinitiatorwasstudied.Theeffectofradiativetimewithpolymerandtherelationshipsbe-tweengraftingrateandradiationdoserate,monomerconcentration,radiativetemperatureandstarchconcentrationwereobtained,basedonwhichtheequationforthegraftcopolymerizationwasderived:Rp=k[I]1/2[AM][AGU]1/2.Ontheotherhand,thereactioncoursewasinvestigated.Theseresultsshowthattheequationbytheoryforthegraftcopolymerizationissamewiththatbyexperiment.Keywords:graft-copolymerization;radiation;acrylamide;starch702001
本文标题:淀粉和丙烯酰胺的辐照接枝共聚反应研究杨波
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